Name: Working of an Electric Bell
Uploaded: 2019-07-19
Duration: 4 min 44 s
Description: Electromagnets form the base of many common devices, including an electric bell. Let’s open up one such electric bell to see how it works in this video.

Question

Explain the working of an electric bell using diagrams.

Accepted Answer

An electric bell is a battery-operated device consisting of a U-shaped electromagnet connected to a battery and a switch. The base of the U-shaped electromagnet is also connected (not electrically, but mechanically) to a small metallic ball, which is generally called the hammer.

When we push the switch of the bell, an electric current flows to the electromagnet.

The electromagnet attracts the soft iron strip. The hammer attached to the strip then hits the gong, causing a ring.

When the soft iron strip gets attracted to the electromagnet, it no longer touches the screw (interrupter) and hence the circuit is broken (much like a switch being turned off). This turns off the electromagnet and it can no longer attract the soft iron strip. The soft iron strip returns to its initial position, touching the screw (interrupter). This results in the circuit being complete, and current flows again.

Explain the working of an electric bell using diagrams.

Important Questions on Electric Current and Circuits

Learn and Prepare for any exam you want !